U.S. patent application number 10/058041 was filed with the patent office on 2002-12-12 for coaxial cable connector.
Invention is credited to Obayashi, Katsuaki.
Application Number | 20020187660 10/058041 |
Document ID | / |
Family ID | 18977941 |
Filed Date | 2002-12-12 |
United States Patent
Application |
20020187660 |
Kind Code |
A1 |
Obayashi, Katsuaki |
December 12, 2002 |
Coaxial cable connector
Abstract
A coaxial cable connector 1 including a connection terminal (2)
to be connected to an internal conductor (34) of a coaxial cable 31
and a metal shell (4) for supporting the connection terminal (2)
via an insulating member 3 establishes electrical connection
between the internal conductor (34) of the coaxial cable (31) and
the connection terminal (2) by bending the connection terminal (2)
according to the respective bending forces of the shell (4) and the
insulating member (3) and making such connection terminal (2)
retain the internal conductor (34) of the coaxial cable (31).
Inventors: |
Obayashi, Katsuaki;
(Yokohama-shi, JP) |
Correspondence
Address: |
Vincent L. Ramik
DILLER, RAMIK & WIGHT
Suite 101
7345 McWhorter Place
Annandale
VA
22003
US
|
Family ID: |
18977941 |
Appl. No.: |
10/058041 |
Filed: |
January 29, 2002 |
Current U.S.
Class: |
439/63 |
Current CPC
Class: |
H01R 4/185 20130101;
H01R 9/0518 20130101 |
Class at
Publication: |
439/63 |
International
Class: |
H05K 001/00; H01R
012/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 26, 2001 |
JP |
129413/2001 |
Claims
What is claimed is:
1. A coaxial cable connector, comprising: a connection terminal to
be connected to an internal conductor of a coaxial cable; and a
metal shell for supporting the connection terminal via an
insulator, wherein the connection terminal is bent with respective
bending forces of the shell and the insulator to make the
connection terminal retain the internal conductor of the coaxial
cable, so that electrical connection is established between the
internal conductor of the coaxial cable and the connection
terminal.
2. A coaxial cable connector according to claim 1, wherein the
connection terminal comprises a pair of contacts facing each other
that are formed by bending a blade spring in an approximate dogleg
shape.
3. A coaxial cable connector according to claim 1, wherein the
insulator comprises an insulator main body that supports one
contact of the pair of contacts, and an insulator bending portion
disposed at the side of another contact of the pair of contacts
with respect to the insulator main body.
4. A coaxial cable connector according to claim 1, wherein the
shell comprises a shell main body that supports the insulator main
body, and a shell bending portion juxtaposed to the insulator
bending portion.
5. A coaxial cable connector according to claim 4, wherein the
shell comprises an engagement tongue portion at the side of the
shell bending portion.
6. A coaxial cable connector according to claim 1, wherein the
connection terminal comprises a pair of contacts facing each other
that are formed by bending a blade spring in an approximate dogleg
shape; the insulator comprises an insulator main body that supports
one contact of the pair of contacts, and an insulator bending
portion disposed at the side of another contact of the pair of
contacts with respect to the insulator main body; the shell
comprises a shell main body that supports the insulator main body,
and a shell bending portion juxtaposed to the insulator bending
portion; and the shell bending portion and the insulator bending
portion are bent toward the shell main body and the insulator main
body, respectively, after disposing the internal conductor of the
coaxial cable between the pair of contacts, whereby the another
contact is caused to press the internal conductor of the coaxial
cable against the one contact according to the respective bending
forces of the shell bending portion and the insulator bending
portion, so that the pair of contacts retains the internal
conductor of the coaxial cable and electrically connects the
internal conductor of the coaxial cable and the connection
terminal.
7. A coaxial cable connector according to claim 1, wherein the
connection terminal comprises a pair of contacts facing each other
that are formed by bending a blade spring in an approximate dogleg
shape; the insulator comprises an insulator main body that supports
one contact of the pair of contacts, and an insulator bending
portion disposed at the side of another contact of the pair of
contacts with respect to the insulator main body; the shell
comprises a shell main body that supports the insulator main body,
a shell bending portion juxtaposed to the insulator bending portion
and an engagement tongue portion provided at the side of the shell
bending portion; the shell bending portion and the insulator
bending portion are bent toward the shell main body and the
insulator main body, respectively, after disposing the internal
conductor of the coaxial cable between the pair of contacts,
whereby the another contact is caused to press the internal
conductor of the coaxial cable against the one contact according to
the respective bending forces of the shell bending portion and the
insulator bending portion, so that the pair of contacts retains the
internal conductor of the coaxial cable and electrically connects
the internal conductor of the coaxial cable and the connection
terminal; and the engagement tongue portion is engaged with the
shell main body, whereby the electrical connection of the internal
conductor of the coaxial cable and the connection terminal is
maintained.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is based upon and claims the benefit of
priority from the prior Japanese Patent Application No. 2001-129413
filed on Apr. 26, 2001; the entire contents of this prior
application being incorporated herein by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a cable-relay connector
used in IT devices such as laptop computers and compact electronic
devices such as home electric appliances, and particularly to a
coaxial cable connector for connecting coaxial cables.
[0004] 2. Description of the Related Art
[0005] Numerous coaxial cables are used for the internal wiring of
IT devices such as laptop computers and compact electronic devices
such as home electric appliances, and such coaxial cables are
usually used by being electrically connected to the respective
conductors of other cables, substrates or the like.
[0006] In order to electrically connect such coaxial cables to, for
example, a conductor of another cables, conventionally, internal
conductors of the respective coaxial cables were one by one
soldered to the conductor of other corresponding cables. As a
result, internal conductors of coaxial cables were electrically
connected to the conductors of other cables.
[0007] Nevertheless, with this electrical connection method,
connection errors during the soldering process would often occur,
and there is a problem in that the electrical connection between
the internal conductors of coaxial cables and the conductors of
other cables could not be conducted with precision.
[0008] Moreover, since the soldering process is complicated, there
is a problem in that much time is required for the connection
process, and that the loss is great due to failures of the
connection process.
[0009] In order to overcome such problems, conventionally, a
coaxial cable connector has been proposed as a device for
electrically connecting the internal conductors of coaxial cables
and the conductors of other cables.
[0010] With this conventional coaxial cable connector, a connection
terminal for electrically connecting to the internal conductors of
coaxial cables is provided inside a shell, and such connection
terminal is constituted by a pair of armatures formed by bending
metal blade springs.
[0011] With this conventional coaxial cable connector, when the
internal conductors of coaxial cables are engagably inserted into
the opening of the shell, such internal conductors are engagably
inserted between the pair of armatures, which are connection
terminals, and retained by such pair of armatures by the resilience
thereof The internal conductors of coaxial cables and the
connection terminals are electrically connected thereby.
[0012] Further, the coaxial cable connector connected to this
internal conductor may be engagably connected to a separate relay
connector. Upon electrically connecting beforehand a conductor of
another cable to a contact portion of such separate relay connector
and engagably connecting a coaxial cable to this separate relay
connector, since the aforementioned connection terminal and the
contact portion will become engaged, the internal conductor of the
coaxial cable may thereby be electrically connected to the
conductor of another cable.
[0013] According to this type of conventional coaxial cable
connector, it is possible to prevent, as much as possible,
connection errors since soldering operations are not required for
the electrical connection of the internal conductor of the coaxial
cable and the conductor of another cable, and it is thereby
possible to conduct such electrical connection with precision.
Moreover, since soldering operations are not required, the
connection process is simplified, the operation time is shortened,
and losses caused by failures of the connection process can be
decreased as much as possible.
[0014] Meanwhile, with the conventional coaxial cable connector,
the connection terminal thereof retains the internal conductor of
the coaxial cable merely with its resilience in order to conduct
the electrical connection of the internal conductor of the coaxial
cable and the connection terminal. Thus, the retaining power for
retaining the internal conductor is weak. As a result, when the
coaxial cable electrically connected to the connection terminal is
moved due to some kind of operation, there is a problem in that the
internal conductor of the coaxial cable will separate from the
connection terminal and the internal conductor of the coaxial cable
and the connection terminal will no longer be in electrical
connection, and the electrical connection between coaxial cables
and other cables cannot be established thereby.
SUMMARY OF THE INVENTION
[0015] An object of the present invention is to provide a coaxial
cable connector enabling a simplified connection process of coaxial
cables while shortening the time required therefor, and which has
small loss even upon the failure of the connection process, and
which enables a further accurate connection of coaxial cables.
[0016] In order to achieve the foregoing object, the present
invention provides a coaxial cable connector, comprising a
connection terminal to be connected to an internal conductor of a
coaxial cable; and a metal shell for supporting the connection
terminal via an insulator, wherein the connection terminal is bent
with respective bending forces of the shell and the insulator to
make the connection terminal retain the internal conductor of the
coaxial cable, so that electrical connection is established between
the internal conductor of the coaxial cable and the connection
terminal.
[0017] Other objects and advantages of the present invention will
be more fully apparent from the ensuing detailed description and
appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] FIG. 1 is a schematic cross section of the relevant parts
illustrating the coaxial cable connector of an embodiment according
to the present invention, and, in particular, is a diagram showing
the state of the coaxial cable connector prior to the connection of
the coaxial cable;
[0019] FIG. 2 is an enlarged schematic cross section of the
connection terminal of the coaxial cable connector depicted in FIG.
1;
[0020] FIG. 3 is a left side view of the connection terminal of
FIG. 2;
[0021] FIG. 4 is a schematic cross section of the relevant parts of
the coaxial cable connector depicted in FIG. 1, and, in particular,
is a diagram showing the operation of connecting coaxial
cables;
[0022] FIG. 5 is a schematic cross section of the relevant parts of
the coaxial cable connector depicted in FIG. 1, and, in particular,
is a diagram showing the state of having connected the coaxial
cables;
[0023] FIG. 6(a) through FIG. 6(c) are schematic cross sections of
the relevant parts depicted in FIG. 5, respectively, and, in
particular, FIG. 6(a) is a cross section of FIG. 5 viewed from
VI(a)-VI(a), FIG. 6(b) is a cross section of FIG. 5 viewed from
VI(b)-VI(b), and FIG. 6(c) is a cross section of FIG. 5 viewed from
VI(c)-VI(c);
[0024] FIG. 7(a) through FIG. 7(c) are schematic cross sections of
the relevant parts showing the coaxial cable connector in which the
connected between the coaxial cable and connection terminal is
maintained, and, in particular, FIG. 7(a) is a diagram showing the
state where the first engagement tongue portion depicted in FIG.
6(a) is engaged with the coaxial cable insulator, FIG. 7(b) is a
diagram showing the state where the second engagement tongue
portion depicted in FIG. 6(b) is engaged with and retained by the
external conductor of the coaxial cable, and FIG. 7(c) is a diagram
showing the state where the third engagement tongue portion
depicted in FIG. 6(c) is engaged with and retained by an exterior
covering of the coaxial cable;
[0025] FIG. 8 is a schematic cross section of the relevant parts of
the coaxial cable connector depicted in FIG. 1, and, in particular,
is a diagram showing the state where connection between the coaxial
cable and the connection terminal is maintained;
[0026] FIG. 9 is a schematic side view of the coaxial cable
connector depicted in FIG. 1, and, in particular, is a schematic
side view showing the state where connection between the coaxial
cable and the connection terminal is maintained; and
[0027] FIG. 10 is a schematic planar cross section showing the
coaxial connection of another embodiment according to the present
invention, and, in particular, is a diagram showing the state where
the coaxial cable and connection terminal are connected, and such
connection being maintained.
DESCRIPTION OF THE EMBODIMENTS
[0028] Embodiments of the coaxial cable connector of the present
invention is now described in detail in the following
embodiments.
[0029] FIG. 1 is a schematic cross section of the relevant parts of
the coaxial cable connector of an embodiment according to the
present invention, and, in particular, is a diagram showing the
state of the coaxial cable connector prior to the connection of the
coaxial cable.
[0030] This coaxial cable connector (hereinafter simply referred to
as "connector") 1, as shown in FIG. 1, comprises a connection
terminal 2 to be connected to an internal conductor 34 of a coaxial
cable 31, and a metal shell 4 for supporting the connection
terminal 2 via an insulating member 3.
[0031] Among the above components, the connection terminal 2, as
shown in in FIG. 2, which is an enlarged schematic front view of
such connection terminal 2, is constituted by a pair of contacts
2a, 2b facing each other and formed by bending a metal blade spring
into an approximate dogleg shape, and an engagement member 2c
disposed on the contact 2a side among the pair of contacts 2a,
2b.
[0032] In addition, the engagement member 2c among the above, as
shown in FIG. 3, which is a left side view of FIG. 2, is
constituted by a pair of engagement tongue portions, and such pair
of engagement tongue portions, as described later, engages with and
retains a contact portion of a separate relay connector not
shown.
[0033] Meanwhile, as shown in FIG. 1, the insulating member 3
disposed between the connection terminal 2 and shell 4 is
constituted by an insulator main body 3a for supporting the contact
2a of the connection terminal, and an insulator bending portion 3b
disposed on the other contact 2b side and bent toward the insulator
main body 3a.
[0034] Further, the shell 4 is constituted by a shell main body 4a
for supporting the insulator main body 3a of the insulating member
3, a shell bending portion 4b juxtaposed to the insulator bending
portion 3b of the insulating member 3 and which is bent together
with the insulator bending portion 3b, and a first engagement
tongue portion 4c (engagement tongue portion) formed on each side
(FIG. 6(a)) of the shell bending portion 4b, respectively.
[0035] Moreover, as shown in FIG. 1, a second engagement tongue
portion 4d (FIG. 6(b)) and a third engagement tongue portion 4e
(FIG. 6(c)) are respectively formed on both sides of the shell
bending portion 4b, and such second engagement tongue portion 4d
and third engagement tongue portion 4e are formed integrally.
[0036] In addition, an annular engagement groove 4f for engaging
with the shell of the aforementioned separate relay connector is
formed on the shell main body 4a.
[0037] Meanwhile, the coaxial cable 31 to be electrically connected
with the connector 1 as structured above generally comprises an
internal conductor 34 made of copper wire and an insulator 35 for
directly circumscribing such copper wire disposed within an
external conductor 33 circumscribed by an exterior covering 32.
[0038] To electrically connect its internal and external conductors
34 and 33 with the connector 1, the coaxial cable 31 partially
exposes and uses the external conductor 33, insulator 35 and
internal conductor 34 as shown in FIG. 1.
[0039] Next, the method of electrically connecting the internal
conductor 34 of the coaxial cable 31 to the connector 1 is
explained, and the structure of the connector 1 is described in
detail.
[0040] In order to electrically connect the internal conductor 34
of the coaxial cable 31 to the connector 1 depicted in FIG. 1, the
coaxial cable 31 is foremost moved to the connector 1 side as shown
with the arrow A.
[0041] Then, as shown in FIG. 4, the internal conductor 34 of the
coaxial cable 31 is disposed between the contacts 2a, 2b.
[0042] Next, as shown with the arrow B of FIG. 4, the shell bending
portion 4b and the insulator bending portion 3b are simultaneously
bent toward the shell main body 4a and the insulator main body
3a.
[0043] Whereby, as shown in FIG. 5, the contact 2b structuring the
connection terminal 2 presses the internal conductor 34 of the
coaxial cable 31 to the contact 2a with the respective bending
forces of the shell bending portion 4b and the insulator bending
portion 3b. As a result, the pair of contacts 2a, 2b elastically
deform and retain the internal conductor 34 of the coaxial cable 31
between them. The internal conductor 34 of the coaxial cable 31 and
the connection terminal 2 are thereby electrically connected.
[0044] In the connector 1 electrically connected as described
above, as shown in FIG. 5 and FIG. 6(a) that is a cross section of
FIG. 5 viewed from VI(a)-VI(a), the shell bending portion 4b covers
the insulator 35 and the internal conductor 34 of the coaxial cable
31 as well as the shell main body 4a and the insulator main body 3a
of the connector 1 by means of the respective first engagement
tongue portions 4c provided on both sides thereof
[0045] Further, the tip of the respective first engagement tongue
portions 4c, as shown in FIG. 5, is disposed below the support
portion 4k of the shell main body 4a supporting the insulator 35 of
the coaxial cable 31, and the insulator main body 3a.
[0046] In addition, the shell bending portion 4b, as shown in FIG.
5 and FIG. 6(b) which is a schematic cross section of FIG. 5 viewed
from VI(b)-VI(b), covers the external conductor 33 of the coaxial
cable 31 by means of the respective second engagement tongue
portions 4d, and the tip of the respective second engagement tongue
portions 4d is disposed below the external conductor 33 of the
coaxial cable 31.
[0047] Further, as shown in FIG. 5 and FIG. 6(c) which is a
schematic cross section of FIG. 5 viewed from VI(c)-VI(c), the
shell bending portion 4b covers the exterior covering 32 of the
coaxial cable 31 by means of the respective third engagement tongue
portions 4e. The tip of the third engagement tongue portions 4e is
disposed below the exterior covering 32 of the coaxial cable
31.
[0048] Then, as shown in FIG. 7(a), the respective first engagement
tongue portions 4c are each pushed toward the internal width
direction of the shell main body 4a and the insulator main body 3a,
and engaged with the shell main body 4a and the insulator main body
3a.
[0049] Whereby, as shown in FIG. 8 which is a schematic cross
section of the connector 1, the respective bending forces upon
bending the shell bending portion 4b and the insulator bending
portion 3b can be retained, and it is thereby possible to maintain
the connection terminal 2 in a state where it is retaining the
internal conductor 34. The electrical connection of the internal
conductor 34 of the coaxial cable 31 and the connection terminal 2
can be maintained thereby.
[0050] Moreover, by making the respective second engagement tongue
portions 4d depicted in FIG. 6(b) engage with and retain the
external conductor 33 of the coaxial cable 31 as shown in FIG. 7(b)
and FIG. 8, the respective bending forces generated upon bending
the shell bending portion 4b and the insulator bending portion 3b
can be further retained. The electrical connection of the internal
conductor 34 of the coaxial cable 31 and the connection terminal 2
can be further maintained thereby. Therefore, the electrical
connection of the internal conductor 34 of the coaxial cable 31 and
the connection terminal 2 can be maintained securely.
[0051] Moreover, by additionally making the respective third
engagement tongue portions 4e depicted in FIG. 6(c) engage with and
retain the exterior covering 32 of the coaxial cable 31 as shown in
FIG. 7(c) and FIG. 8, the respective bending forces generated upon
bending the shell bending portion 4b and the insulator bending
portion 3b can be further retained. The electrical connection of
the internal conductor 34 of the coaxial cable 31 and the
connection terminal 2 can be further maintained thereby. Therefore,
the electrical connection of the internal conductor 34 of the
coaxial cable 31 and the connection terminal 2 can be maintained
even more securely.
[0052] The state of electrically connecting the connector 1 with
the internal conductor 34 of the coaxial cable 31 as described
above is shown in FIG. 9, which is a schematic side view of the
connector 1.
[0053] The connector 1 can be engagably attached to the
aforementioned separate relay connector (not shown) via the annular
engagement groove 4f of the shell main body 4a depicted in FIG.
9.
[0054] By electrically connecting beforehand a conductor of a
separate cable not shown to the aforementioned contact portion of
the separate relay connector and engagably attaching the shell of
such separate relay connector to the engagement groove 4f of the
connector 1 from the direction of the arrow F, the engagement
member 2c (FIG. 3) of the connection terminal 2 engages with and
retains the contact portion. It is thereby possible to establish
the electrical connection of the internal conductor 34 of the
coaxial cable 31 and a conductor of other cables.
[0055] Moreover, with the connector 1 which seeks the electrical
connection of the internal conductor 34 of the coaxial cable 31 and
the conductor of other cables, as described above, the connection
terminal 2 of the connector 1 and the internal conductor 34 of the
coaxial cable 31 are electrically connected by the respective
bending forces of the shell bending portion 4b and the insulator
bending portion 3b applied externally. Thus, in comparison to the
conventional electrical connections of retaining the internal
conductor 34 of the coaxial cable 31 only with the resilience of
the connection terminal 2, the power of retaining the internal
conductor 34 is greater. As a result, it is possible to prevent, as
much as possible, the internal conductor 34 of the coaxial cable 31
from separating from the connection terminal 2 even in cases where
the coaxial cable 31 electrically connected with the connection
terminal 2 is moved by some kind of operation.
[0056] Therefore, it is possible to electrically connect the
internal conductor 34 of the coaxial cable 31 to the connection
terminal 2 with certainty, and the electrical connection of the
internal conductor 34 of the coaxial cable 31 with a conductor of
other cables can thereby be secured.
[0057] Further, with this connector 1, a first engagement tongue
portion 4c, a second engagement tongue portion 4d and a third
engagement tongue portion 4e are formed on the side of the shell
bending portion 4b, and these engagement tongue portions 4c, 4d, 4e
are respectively engaged with the shell main body 4a so as to
retain the respective bending forces generated upon bending the
shell bending portion 4b and the insulator bending portion 3b.
Thus, as described above, the separation of the coaxial cable 31 is
prevented, and it is thereby possible to maintain for a long period
of time the electrical connection, in which such connection is
secured, of the internal conductor 34 of the coaxial cable 31 and
the connection terminal 2.
[0058] Moreover, the shell bending portions 4b of the shell 4
directly engage with the external conductor 33 of the coaxial cable
31 and the exterior covering 32, respectively, pursuant to the
second engagement tongue portion 4d and the third engagement tongue
portion 4e. Thus, such engagements also prevent the coaxial cable
31 from separating from the connection terminal 2, and it is
thereby possible to maintain for a long period of time the
electrical connection, in which such connection is secured, of the
internal conductor 34 of the coaxial cable 31 and the connection
terminal 2.
[0059] In addition, with this connector 1, since a soldering
process in not necessary to establish the electrical connection of
the internal conductor 34 of the coaxial cable 31 and a conductor
of other cables, it is possible to prevent connection errors as
much as possible, thereby enabling the secure electrical connection
of the internal conductor 34 of the coaxial cable 31 and the
connection terminal 2. Thus, the electrical connection of the
internal conductor 34 of the coaxial cable 31 and the conductor of
other cables can be established with certainty.
[0060] Further, with this connector 1, since a soldering process in
not necessary to establish the electrical connection of the
internal conductor 34 of the coaxial cable 31 and a conductor of
other cables, the connection process is simplified, the operation
time is shortened thereby, and the loss caused by failures of the
connection process can be reduced as much as possible.
[0061] With the connector 1 of the foregoing embodiment, the shell
bending portion 4b of the shell 4 and the insulator bending portion
3b of the insulating member 3 are, as shown with the arrow B in
FIG. 4, bent so as to cover the internal conductor 34 of the
coaxial cable 31 from above, and the connection terminal 2 is bent
so as to retain the internal conductor 34 from the vertical
direction with the respective bending forces of the shell bending
portion 4b and the insulator bending portion 3b. Nevertheless, the
connector of this invention does not limit the bending direction of
the shell bending portion 4b, insulator bending portion 3b and
connection terminal 2. For example, as shown in FIG. 10, which is a
schematic planar cross section of a connector 21 of another
embodiment, the shell bending portion 24b of the shell 24 and the
insulator bending portion 23b of the insulating member 23 may be
bent toward the internal conductor 34 of the coaxial cable 31 from
both sides of such internal conductor 34, respectively, and the
connection terminal 22 may be elastically deformed so as to retain
the internal conductor 34 from both sides with the respective
bending forces of the shell bending portion 24b and the insulator
bending portion 23b.
[0062] Moreover, although not shown in FIG. 10, the shell bending
portion 24b of the shell 24 is engaged with the shell main body via
an engagement tongue portion formed on the shell bending portion
24b. Reference numeral 24d in FIG. 10 is the engagement tongue
portion formed on the shell bending portion 24b, and is an
engagement tongue portion for engaging with and retaining the
external conductor 33 of the coaxial cable 31.
[0063] As described above, with the coaxial cable connector
according to the present invention, the connection terminal of the
connector and the internal conductor of the coaxial cable are
electrically connected with the respective bending forces of the
shell bending portion and the insulator bending portion applied
externally. Thus, in comparison to the conventional electrical
connections of retaining the internal conductor of the coaxial
cable only with the resilience of the connection terminal, the
power of retaining the internal conductor is greater. As a result,
it is possible to prevent, as much as possible, the internal
conductor of the coaxial cable from separating form the connection
terminal even in cases where the coaxial cable electrically
connected with the connection terminal is moved by some kind of
operation. Thereby, the electrical connection of the internal
conductor of the coaxial cable and the conductor of other cables
can be sought with certainty. Since a soldering process in not
necessary upon seeking the electrical connection of the internal
conductor of the coaxial cable and a conductor of other cables, the
connection process is simplified, the operation time is shortened
thereby, and the loss caused by failures of the connection process
can be reduced as much as possible.
* * * * *